Does keeping a solar cover on the pool cause algae. I am in a shaded area and like to keep the pool cover on to keep in the heat. My pool keeps turning green and I want to know if is is the cover?

Algae is caused by sunlight and bacteria. The solar cover helps keep the chlorine in during the day under direct sun if in place; the green is probably due to bacteria rather than the the cover holding heat; scrub pool bottom and sides, add chlorine shock at 1 lb per 10000 gallons and run filter for 24 hours.